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James Mcgrath — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this James Mcgrath across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 11-person household.
Age 14
b. ~1926
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | CHICAGO |
| 1935 Residence (County) | COOK |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1926 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Rita Mcgrath | Daughter | — | 7 | ~1933 |
| Margaret Mcgrath | Daughter | — | 11 | ~1929 |
| Rose Mcgrath | Daughter | — | 8 | ~1932 |
| Elizabeth Mcgrath | Daughter | — | 20 | ~1920 |
| Mary Mcgrath | Daughter | — | 18 | ~1922 |
| Susan Mcgrath | Daughter | — | 15 | ~1925 |
| James Mcgrath | Head | — | 53 | ~1887 |
| Owen Mcgrath | Son | — | 22 | ~1918 |
| James Mcgrath | Son | — | 14 | ~1926 |
| Jack Mcgrath | Son | — | 5 | ~1935 |
| Sarah Mcgrath | Spouse | — | 42 | ~1898 |
Census Appearances
1930
Cook, Illinois
Other, age 4
Cook, Illinois · implied b. ~1926 — 48 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 14
Cook-County, Illinois · implied b. ~1926 — 11 household members
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | CHICAGO |
| 1935 Residence (County) | COOK |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links James Mcgrath across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Mcgrath
Son · 1940 · age 14 · b. ~1926 · Illinois
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Sibling
Jack Mcgrath
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Susan Mcgrath
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Mcgrath
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcgrath
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Mcgrath
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Owen Mcgrath
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mcgrath
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Mcgrath
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00948-00453)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Howard Rio | 16 | Son | — | Illinois |
| 42 | Kenneth Rio | 15 | Son | — | Illinois |
| 43 | Betty Lou Rio | 12 | Daughter | — | Illinois |
| 44 | Frank Jacob | 56 | Brother-in-law | Electrician | Illinois |
| 45 | Edna Jacob | 26 | Niece | Stenographer | Illinois |
| 46 | Marion Jareck | 33 | Head | Printing | Illinois |
| 47 | Katherine Jareck | 35 | Sister | Switch Board Soldering | Illinois |
| 48 | Anna Jareck | 28 | Sister | Stenography | Illinois |
| 49 | Jacob P. Grafen | 59 | Head | Watchman | Illinois |
| 50 | Anna M. Grafen | 54 | Wife | — | France |
| 51 | Michael Heinen | 25 | Head | Chauffer | Illinois |
| 52 | Amelia Heinen | 23 | Wife | — | Illinois |
| 53 | Michael Jr. Heinen | 2 | Son | — | Illinois |
| 54 | Joseph Ringhofer | 42 | Head | Electrician | Hungary |
| 55 | Elsie Ringhofer | 43 | Wife | — | Illinois |
| 56 | Joseph H. Ringhofer | 17 | Son | — | Illinois |
| 57 | Shirley Ringhofer | 13 | Daughter | — | Illinois |
| 58 | Joan Ringhofer | 11 | Daughter | — | Illinois |
| 59 | John Kulovits | 50 | Head | Airbrake Man | Hungary |
| 60 | Theresa Kulovits | 48 | Wife | — | Hungary |
| 61 | Gertrude Kulovits | 16 | Daughter | — | Illinois |
| 62 | James J. Mcgrath | 53 | Head | Checker | Eire |
| 63 | Sarah Mcgrath | 42 | Wife | — | Eire |
| 64 | Owen Mcgrath | 22 | Son | Mail Clerk | Illinois |
| 65 | Elizabeth Mcgrath | 20 | Daughter | — | Illinois |
| 66 | Mary Mcgrath | 18 | Daughter | — | Illinois |
| 67 | Susan Mcgrath | 15 | Daughter | — | Illinois |
| 68 | James Mcgrath THIS PERSON | 14 | Son | — | Illinois |
| 69 | Margaret Mcgrath | 11 | Daughter | — | Illinois |
| 70 | Rose Mcgrath | 8 | Daughter | — | Illinois |
| 71 | Rita Mcgrath | 7 | Daughter | — | Illinois |
| 72 | Jack Mcgrath | 5 | Son | — | Illinois |
| 73 | Nellie Mackey | 47 | Head | — | Illinois |
| 74 | William Mackey | 24 | Son | — | Illinois |
| 75 | Donald Mackey | 22 | Son | — | Illinois |
| 76 | Carolyn Mackey | 20 | Daughter | Telephone Operator | Illinois |
| 77 | Carl Steinman | 42 | Head | Electric Weld | Ohio |
| 78 | Nancy Steinman | 42 | Wife | — | Ohio |
| 79 | Roy Hutchins | 32 | Head | Poke Up Man | Ohio |
| 80 | Ruth Hutchins | 28 | Wife | — | Illinois |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)